TM 5-4310-379-14
Table 3-2. Unit Troubleshooting Procedures (Cont).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
LOW COMPRESSOR OUTPUT (Cont).
Step 3.
Check air system fittings for leaks.
Tighten loose fittings.
7.
COMPRESSOR KNOCKING.
Step 1.
Check oil level.
Add oil as needed.
Step 2.
Check compressor pulley.
Tighten a loose pulley.
Step 3.
Check safety relief valve.
Close if open.
Step 4.
Check receiver for leaks at fittings.
Tighten loose fittings.
8.
AIR RECEIVER WILL NOT LOAD.
Step 1.
Check manual drain valve.
Close manual drain valve.
Step 2.
Check valves.
Close valves if open.
Step 3.
Check receiver for leaks at fittings.
Tighten fittings.
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